OpenGLRenderer.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
 
#include <AUI/GL/Program.h>
#include <AUI/GL/Framebuffer.h>
#include <AUI/GL/Vao.h>
#include "AUI/Render/ABorderStyle.h"
#include "AUI/Render/IRenderer.h"
#include "AUI/GL/RenderTarget/TextureRenderTarget.h"
 
class OpenGLRenderer final: public IRenderer {
friend class OpenGLPrerenderedString;
friend class OpenGLMultiStringCanvas;
public:
   struct FontEntryData: aui::noncopyable {
       Util::SimpleTexturePacker texturePacker;
       gl::Texture2D texture;
       bool isTextureInvalid = true;
 
       FontEntryData() {
           texture.bind();
           texture.setupNearest();
       }
   };
 
private:
   AOptional<gl::Program> mSolidShader;
   AOptional<gl::Program> mGradientShader;
   AOptional<gl::Program> mRoundedSolidShader;
   AOptional<gl::Program> mRoundedSolidShaderBorder;
   AOptional<gl::Program> mRoundedGradientShader;
   AOptional<gl::Program> mBoxShadowShader;
   AOptional<gl::Program> mBoxShadowInnerShader;
   AOptional<gl::Program> mTexturedShader;
   AOptional<gl::Program> mUnblendShader;
   AOptional<gl::Program> mSymbolShader;
   AOptional<gl::Program> mSymbolShaderSubPixel;
   AOptional<gl::Program> mSquareSectorShader;
   AOptional<gl::Program> mLineSolidDashedShader;
   gl::Vao mRectangleVao;
   gl::Vao mBorderVao;
   gl::Texture2D mGradientTexture;
 
 
   struct CharacterData {
       glm::vec4 uv;
   };
 
   ADeque<CharacterData> mCharData;
   ADeque<FontEntryData> mFontEntryData;
   IRenderViewToTexture* mRenderToTextureTarget = nullptr;
 
   struct FramebufferWithTextureRT {
       gl::Framebuffer framebuffer;
       _<gl::TextureRenderTarget<gl::InternalFormat::RGBA8, gl::Type::UNSIGNED_BYTE, gl::Format::RGBA>> rendertarget;
   };
 
   struct FramebufferBackToPool {
       OpenGLRenderer* renderer;
       void operator()(FramebufferWithTextureRT* framebuffer) const;
   };
 
   using FramebufferFromPool = std::unique_ptr<FramebufferWithTextureRT, FramebufferBackToPool>;
   using OffscreenFramebufferPool = AVector<FramebufferFromPool>;

   OffscreenFramebufferPool mFramebuffersForMultiPassEffectsPool;
 
 
   static std::array<glm::vec2, 4> getVerticesForRect(glm::vec2 position, glm::vec2 size);
 
   void uploadToShaderCommon();
 
   FontEntryData* getFontEntryData(const AFontStyle& fontStyle);

   bool setupLineShader(const ABrush& brush, const ABorderStyle& style, float widthPx);
 

   FramebufferFromPool getFramebufferForMultiPassEffect(glm::uvec2 minRequiredSize);
 
   void backdrops(glm::ivec2 fbSize, glm::ivec2 size, std::span<ass::Backdrop::Preprocessed> backdrops) override;
 
protected:
   _unique<ITexture> createNewTexture() override;
 
public:
   OpenGLRenderer();
   ~OpenGLRenderer() override = default;
   void identityUv();
   bool isVaoAvailable() const noexcept;
 
   void rectangle(const ABrush& brush,
                  glm::vec2 position,
                  glm::vec2 size) override;
 
   void roundedRectangle(const ABrush& brush,
                         glm::vec2 position,
                         glm::vec2 size,
                         float radius) override;
 
   void rectangleBorder(const ABrush& brush,
                        glm::vec2 position,
                        glm::vec2 size,
                        float lineWidth) override;
 
   void roundedRectangleBorder(const ABrush& brush,
                               glm::vec2 position,
                               glm::vec2 size,
                               float radius,
                               int borderWidth) override;
 
   void boxShadow(glm::vec2 position,
                  glm::vec2 size,
                  float blurRadius,
                  const AColor& color) override;
       
   void boxShadowInner(glm::vec2 position,
                       glm::vec2 size,
                       float blurRadius,
                       float spreadRadius,
                       float borderRadius,
                       const AColor& color,
                       glm::vec2 offset) override;
 
   void string(glm::vec2 position,
               const AString& string,
               const AFontStyle& fs) override;
 
   _<IPrerenderedString> prerenderString(glm::vec2 position, const AString& text, const AFontStyle& fs) override;
 
   void drawRectImpl(glm::vec2 position, glm::vec2 size);
 
   void setBlending(Blending blending) override;
 
   _<IMultiStringCanvas> newMultiStringCanvas(const AFontStyle& style) override;
 
   glm::mat4 getProjectionMatrix() const override;
 
   void lines(const ABrush& brush, AArrayView<glm::vec2> points, const ABorderStyle& style, AMetric width) override;
 
   void lines(const ABrush& brush, AArrayView<std::pair<glm::vec2, glm::vec2>> points, const ABorderStyle& style, AMetric width) override;
 
   void points(const ABrush& brush, AArrayView<glm::vec2> points, AMetric size) override;
 
   void squareSector(const ABrush& brush,
                     const glm::vec2& position,
                     const glm::vec2& size,
                     AAngleRadians begin,
                     AAngleRadians end) override;
 
   void pushMaskBefore() override;
   void pushMaskAfter() override;
   void popMaskBefore() override;
 
   _unique<IRenderViewToTexture> newRenderViewToTexture() noexcept override;
 
   void popMaskAfter() override;
 
   void beginPaint(glm::uvec2 windowSize);
   void endPaint();
   
   uint32_t getDefaultFb() const noexcept;
   void bindTemporaryVao() const noexcept;
};
 
 

© 2025 AUI Framework Contributors. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. All trademarks are property of their respective owners.